(((\[LeftBracketingBar]E(d)\[RightBracketingBar])^2)=[(cos^2)φ+((Subscript[q, s]^2)/(q^2))(sin^2)φ](e^(2ik α y))=[(cos^2)φ+((Subscript[n, s]^2)/(n^2))(sin^2)φ](e^(2ik α y))(15))